Drain structure

ABSTRACT

A drain structure used for mounting in a pipe includes a ring wall, a bottom plate and a chamber, wherein at least one overflow hole mounted on the ring wall communicates with an inner ring wall and an outer ring wall. The overflow hole comprises a first opening and a second opening, wherein the first opening comprises a top edge, and the second opening comprises a bottom edge. A first horizontal surface passes through the top edge of the first opening, and a second horizontal surface passes through the bottom edge of the second opening, wherein the first horizontal surface is not higher than the second horizontal surface to form a first water tank between the second horizontal surface and the bottom plate. Liquid accumulated in the first water tank is able to prevent insects and gases in outdoors from entering indoors via the pipe.

FIELD OF THE INVENTION

The present invention relates to a drain structure, particularly relates to a drain structure enables prevent insects or gases from entering indoors.

BACKGROUND OF THE INVENTION

Conventional pipe is used to guide water flow usually, for instance, water in bathroom is able to be guided to flow toward outdoors or sewage tank by the pipe when the pipe is installed in bathroom. However, owing to the pipe connects with bathroom and outdoors (or sewage tank), thus insects or gases in outdoors or sewage tank enable enter indoors or bathroom via the pipe.

Therefore, insecticide is sprayed in indoors or bathroom usually for preventing insects from entering indoors or bathroom. Or use a plug to plug up the pipe opening, but it is inconvenience for usage.

SUMMARY

The primary object of the present invention is to provide a drain structure installed in a pipe used for preventing insects or gases in outdoors or sewage tank from entering indoors or bathroom via the pipe.

A drain structure of the present invention includes a ring wall, a bottom plate coupled with the ring wall and a chamber located above the bottom plate, the ring wall surrounds the chamber and comprises an inner ring wall and an outer ring wall, the chamber comprises an opening used for liquid flow into the chamber, wherein at least one overflow hole mounted on the ring wall communicates with the inner ring wall and the outer ring wall, a liquid flow passage is formed by the opening, the chamber and the overflow hole. The overflow hole comprises a first opening located on the inner ring wall and a second opening located on the outer ring wall, the first opening communicates with the chamber and comprises a top edge, and the second opening comprises a bottom edge. A first horizontal surface passes through the top edge of the first opening, and a second horizontal surface passes through the bottom edge of the second opening, wherein the first horizontal surface is not higher than the second horizontal surface to form a first water tank between the second horizontal surface and the bottom plate.

Liquid accumulated in the first water tank enables to prevent insects or gases in outdoors or sewage tank from entering indoors via the pipe.

DESCRIPTION OF THE DRAWINGS

FIG. 1 is a perspective partial section view illustrating a drain structure in accordance with a first embodiment of the present invention.

FIG. 2 is a section view illustrating the drain structure in accordance with the first embodiment of the present invention.

FIG. 3 is a section view illustrating the drain structure in accordance with the first embodiment of the present invention.

FIG. 4 is a schematic view illustrating the drain structure in accordance with the first embodiment of the present invention.

FIG. 5 is a schematic view illustrating the drain structure in accordance with the first embodiment of the present invention.

FIG. 6 is a schematic view illustrating the drain structure in accordance with the first embodiment of the present invention.

FIG. 7 is a perspective partial section view illustrating a drain structure in accordance with a second embodiment of the present invention.

FIG. 8 is a section view illustrating the drain structure in accordance with the second embodiment of the present invention.

DETAILED DESCRIPTION OF THE INVENTION

With reference to FIGS. 1, 2 and 3, a drain structure 100 in accordance with a first embodiment of the present invention includes a ring wall 110, a bottom plate 120 and a chamber 130, wherein the ring wall 110 is coupled with the bottom plate 120 and surrounds the chamber 130, and the chamber 130 is located above the bottom plate 120. Preferably, the ring wall 110 is formed as one piece with the bottom plate 120. In this embodiment, the ring wall 110 is a conical ring wall.

With reference to FIGS. 1, 2 and 3, the ring wall 110 of the drain structure 100 comprises an inner ring wall 111 and an outer ring wall 112, and the chamber 130 comprises an opening 131 for liquid flow into the chamber 130. At least one overflow hole 113 is mounted on the ring wall 110 and communicates with the inner ring wall 111 and the outer ring wall 112, wherein a liquid flow passage A is formed by the opening 131, the chamber 130 and the overflow hole 113. The overflow hole 113 comprises a first opening 114 located on the inner ring wall 111 and a second opening 115 located on the outer ring wall 112, wherein the first opening 114 communicates with the chamber 130 and comprises a top edge 114 a, and the second opening 115 comprises a bottom edge 115 a.

With reference to FIGS. 1 and 3, a first horizontal surface X1 passes through the top edge 114 a of the first opening 114, and a second horizontal surface X2 passes through the bottom edge 115 a of the second opening 115, wherein the first horizontal surface X1 is not higher than the second horizontal surface X2 to form a first water tank B between the second horizontal surface X2 and the bottom plate 120. In this embodiment, the first horizontal surface X1 is lower than the second horizontal surface X2, and the top edge 114 a of the first opening 114 is located in the first water tank B.

With reference to FIGS. 1, 2 and 3, the overflow hole 113 is a non-curved hole in this embodiment, and the overflow hole 113 is a straight through hole substantially. An included angle E is defined between a vertical line Y passed through the first horizontal surface X1 and a center line Z passed through the overflow hole 113, wherein the included angle E is an acute angle.

With reference to FIGS. 1, 2 and 3, preferably, the drain structure 100 further includes a supporting ring 150 coupled with the outer ring wall 112 of the ring wall 110. In this embodiment, the supporting ring 150 is formed as one piece with the ring wall 110.

With reference to FIGS. 2 and 4, a pipe 200 is mounted within a floor 300, wherein one end of the pipe 200 is located on floor (such as bathroom floor or kitchen floor). Illustrated by the example of bathroom, a supporting member 400 is usually mounted on one end of the pipe 200 and covered with a cover 500, wherein the cover 500 comprises a plurality of penetrating holes 510 communicating with the pipe 200. After opening the cover 500, the drain structure 100 is mounted on the supporting member 400, and the chamber 130 communicates with the pipe 200 by the overflow hole 113.

With reference to FIGS. 2, 4 and 5, liquid in bathroom is able to flow toward the chamber 130 via the penetrating holes 510 when covering the cover 500, and able to flow toward the pipe 200 via the liquid flow passage A formed by the chamber 130 and the overflow hole 113. In another situation, the drain structure 100 is able to mount on the pipe 200 directly when the pipe 200 without the supporting member 400 and the cover 500.

With reference to FIGS. 3 and 5, the liquid will accumulate in the first water tank B between the second horizontal surface X2 and the bottom plate 120 when the liquid stops flowing. In this embodiment, the top edge 114 a of the first opening 114 lodged in the liquid accumulated in the first water tank B makes the overflow hole 113 being sealed by the liquid in the first water tank B, thus the liquid in the first water tank B is able to prevent insects and gases in outdoors or sewage tank from entering indoors via the pipe 200.

With reference to FIGS. 2 and 6, the drain structure 100 is also able to be mounted in a bleed hole 610 of a bathtub 600 (or water tank). The bleed hole 610 communicates with a tube 700, and the drain structure 100 is mounted in the bleed hole 610. The opening 131 of the chamber 130 is covered with a sealing lid 800 for preventing water lost from the liquid flow passage A of the drain structure 100 when water accumulates in the bathtub 600.

A second embodiment of the present invention is illustrated in mentioned FIGS. 7 and 8, the primary difference between the first and second embodiments is that the drain structure 100 further includes an external ring wall 140 coupled with the ring wall 110 in the second embodiment. A second water tank C is formed between the external ring wall 140 and the ring wall 110. The external ring wall 140 comprises an exposing terminal 141, and an overflow opening D is formed between the exposing terminal 141 and the ring wall 110. In this embodiment, the ring wall 110 is formed as one piece with the external ring wall 140.

With reference to FIGS. 7 and 8, a third horizontal surface X3 passed through the exposing terminal 141 is not lower than the second horizontal surface X2. In this embodiment, the second horizontal surface X2 is lower than the third horizontal surface X3. The liquid will accumulate in the first water tank B between the second horizontal surface X2 and the bottom plate 120 and accumulate in the second water tank C between the external ring wall 140 and the ring wall 110 when the liquid stops flowing. Owing to the third horizontal surface X3 is not lower than the second horizontal surface X2, thus the overflow hole 113 is able to be sealed by the liquid in the first water tank B and the second water tank C to prevent insects and gases in outdoors or sewage tank from entering indoors via the pipe 200.

While this invention has been particularly illustrated and described in detail with respect to the preferred embodiments thereof, it will be clearly understood by those skilled in the art that is not limited to the specific features shown and described and various modified and changed in form and details may be made without departing from the spirit and scope of this invention. 

What is claimed is:
 1. A drain structure including a ring wall, a bottom plate coupled with the ring wall and a chamber located above the bottom plate, the ring wall surrounds the chamber and comprises an inner ring wall and an outer ring wall, the chamber comprises an opening for liquid flow into the chamber, wherein at least one overflow hole mounted on the ring wall communicates with the inner ring wall and the outer ring wall, a liquid flow passage is formed by the opening, the chamber and the overflow hole, wherein the overflow hole comprises a first opening located on the inner ring wall and a second opening located on the outer ring wall, the first opening communicates with the chamber and comprises a top edge, the second opening comprises a bottom edge, wherein a first horizontal surface passes through the top edge of the first opening, and a second horizontal surface passes through the bottom edge of the second opening, and the first horizontal surface is not higher than the second horizontal surface to form a first water tank between the second horizontal surface and the bottom plate.
 2. The drain structure in accordance with claim 1 further includes an external ring wall coupled with the ring wall, wherein a second water tank is formed between the external ring wall and the ring wall, the external ring wall comprises an exposing terminal, an overflow opening is formed between the exposing terminal and the ring wall, wherein a third horizontal surface passed through the exposing terminal is not lower than the second horizontal surface.
 3. The drain structure in accordance with claim 1, wherein the top edge of the first opening is located in the first water tank.
 4. The drain structure in accordance with claim 2, wherein the top edge of the first opening is located in the first water tank.
 5. The drain structure in accordance with claim 1, wherein the ring wall is a conical ring wall.
 6. The drain structure in accordance with claim 2, wherein the ring wall is a conical ring wall.
 7. The drain structure in accordance with claim 1, wherein an included angle is defined between a vertical line passed through the first horizontal surface and a center line passed through the overflow hole, and the included angle is an acute angle.
 8. The drain structure in accordance with claim 2, wherein an included angle is defined between a vertical line passed through the first horizontal surface and a center line passed through the overflow hole, and the included angle is an acute angle.
 9. The drain structure in accordance with claim 1 further includes a supporting ring, wherein the supporting ring is coupled with the outer ring wall of the ring wall.
 10. The drain structure in accordance with claim 2 further includes a supporting ring, wherein the supporting ring is coupled with the outer ring wall of the ring wall.
 11. The drain structure in accordance with claim 1, wherein the ring wall is formed as one piece with the bottom plate.
 12. The drain structure in accordance with claim 2, wherein the ring wall is formed as one piece with the external ring wall. 